John Wesley on Jeremiah 48:11

At ease - The Moabites ever since they began to be a people, have been a quiet people. Settled - Like a cask of wine, that has not been racked but has continued in the same state. Not emptied - A metaphor of wine which is drawn out from vessel to vessel, when it is drawn off the lees. It is expounded by the next words. Therefore - And this is the reason why they retain their old sins, pride, presumption, and luxury.